/Engine/Source/Runtime/Engine/Classes/Engine/AssetManager.h
Returns the root path for the package name or path (i.e. /Game/MyPackage would return /Game/ ). This works even if the root is not yet mounted
static bool GetContentRootPathFromPackageName ( const [FString](API\Runtime\Core\Containers\FString) & PackageName, [FString](API\Runtime\Core\Containers\FString) & OutContentRootPath )